import 'dart:async';
import 'dart:io';
import 'package:flutter/foundation.dart' show kDebugMode;
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_web_plugins/url_strategy.dart';
import 'core/auth/auth_state.dart';
import 'core/config/app_info.dart';
import 'core/errors/error_reporter.dart';
import 'core/platform/single_instance.dart' as single_instance;
import 'core/router/app_router.dart';
import 'core/theme/theme_controller.dart';
import 'core/theme/themes.dart';
import 'providers/connectivity_provider.dart';

void main() {
  usePathUrlStrategy();
  FlutterError.onError = (details) {
    FlutterError.presentError(details);
    debugPrint('═══ FlutterError ════════════════════════════');
    debugPrint(details.exceptionAsString());
    debugPrint(details.stack.toString());
    ErrorReporter.instance.report(
      errorType: ErrorType.flutterError,
      errorMsg: details.exceptionAsString(),
      stackTrace: details.stack,
    );
  };

  runZonedGuarded(
    () async {
      WidgetsFlutterBinding.ensureInitialized();

      if (!await single_instance.acquire()) {
        runApp(const _AlreadyRunningApp());
        return;
      }

      await AppInfo.load(); // 从配置文件加载「关于我们」品牌信息
      runApp(const ProviderScope(child: JiuApp()));
    },
    (error, stack) {
      debugPrint('═══ Zone Error ═══════════════════════════════');
      debugPrint(error.toString());
      debugPrint(stack.toString());
      ErrorReporter.instance.report(
        errorType: ErrorType.zoneError,
        errorMsg: error.toString(),
        stackTrace: stack,
      );
    },
  );
}

class _AlreadyRunningApp extends StatelessWidget {
  const _AlreadyRunningApp();

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Builder(
        builder: (context) {
          WidgetsBinding.instance.addPostFrameCallback((_) {
            showDialog<void>(
              context: context,
              barrierDismissible: false,
              builder: (_) => AlertDialog(
                title: const Text('岩美酒库已在运行'),
                content: const Text('请勿重复打开，程序已在运行中。\n请在任务栏或 Dock 中找到已打开的窗口。'),
                actions: [
                  TextButton(
                    onPressed: () => exit(0),
                    child: const Text('确定'),
                  ),
                ],
              ),
            );
          });
          return const Scaffold();
        },
      ),
    );
  }
}

class JiuApp extends ConsumerStatefulWidget {
  const JiuApp({super.key});

  @override
  ConsumerState<JiuApp> createState() => _JiuAppState();
}

class _JiuAppState extends ConsumerState<JiuApp> {
  @override
  void initState() {
    super.initState();
    // 异步初始化：恢复 auth + 连通性检测
    // 路由 redirect 在 initialized=false 时返回 null（不重定向），
    // 初始化完成后 authState 变化触发 router refresh，redirect 重新执行
    WidgetsBinding.instance.addPostFrameCallback((_) async {
      await ref.read(themeControllerProvider.notifier).restore();
      await ref.read(authStateProvider.notifier).restore();
      await ref.read(connectivityProvider.notifier).forceCheck();
    });
  }

  @override
  Widget build(BuildContext context) {
    final router = ref.watch(appRouterProvider);
    final themeKey = ref.watch(themeControllerProvider);
    return MaterialApp.router(
      title: kDebugMode ? '岩美 [DEBUG]' : '岩美',
      theme: buildTheme(themeKey),
      routerConfig: router,
      debugShowCheckedModeBanner: false,
      localizationsDelegates: const [
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
        GlobalCupertinoLocalizations.delegate,
      ],
      supportedLocales: const [
        Locale('zh', 'CN'),
        Locale('en', 'US'),
      ],
      locale: const Locale('zh', 'CN'),
    );
  }
}